To assess the level of pesticide residues of 21 organophosphorus (OPs) and 5 carbamates
(Carbs) in grapes, a total number of 96 samples of grape fruits and leaves was purchased from the
markets of Qalyubia, Sharkia and Minufiya governorates during 2012 and 2013. The multi-residue
extraction, QuEChERS (quick natural cheap effective rugged and safe) was used for the pesticide
residues. Gas chromatography coupled with FPD detector (GC- FPD) and high-performance liquid
chromatography with a photodiode array detector (HPLC -PDA) was used for the determination of
pesticides residues. Results revealed that all detected pesticide residues in fruit or leaves samples
were above the accepted maximum residue limit (MRL). Oxamyl and profenofos were the most
detected in fruit samples, 22.92% followed by carbofuran and triazophos (20.83% of samples
each). In leaves, oxamyl was the most detected in 47.92% of samples followed by chlorpyrifos in
45.83% of samples. An increase in pesticides contaminated samples analysed in 2013 than in
2012 was observed. Furthermore, the samples of Qalyubia were the highest contaminated
followed by the samples of Sharkia then Minufiya during the two investigated years. |
